Does your fan turn on when you turn on the A/C? If so, your fan is fine. And when you say you replaced the thermostat, are you talking about the actual thermostat under the car and not just the trans thermostats in the expansion tank?
Hi chris does your car have electric fan or viscous. u say it heats up in traffic.If its electric fan can u here when it comes on.
SOURCE: 1991 bmw 318is 4 door 16 valve motor, runs hot and radiator cold
you may have bad waterpump,the impeller on pump may be borken, just because it doesnt leak doesnt mean its good.also could have exhaust entering cooling system (bad headgasket) if pump is good have a block test done.
SOURCE: I have a 2005 325i, my car started overheating all
might sound stupid but did you check the impeller by holding the drive shaft and trying to turn the impeller asnif its a plastic one they tend to come loose on the metal drive shaft and loose power so they are not circulating the coolant ??
SOURCE: I have a 2005 325i,
A BMW that is hot after only two or three miles generally has air in the cooling system. Did you turn on the key and turn up the heater to open the heater valve, and then pour water unto the expansion tank until pure water came out of the bleed screw?
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